Legitimate science passes will pass peer review. Science funded by Exxon-Mobil is advocacy of a self serving view..
There is legitimate debate about the nature and quantity of climate change but none about the principle that Global Warming exists.
If you have some peer reviewed studies or even studies by scientists trained in a relevant field, cite the study. Simply categorizing a view as "politically correct" is a terribly weak argument. The phrase means nothing more than "I disagree" with a snarl for emphasis.